Reorganize files; code to split regions for XSPEC

Reorganize file hierarchy; profiles, spectra, data products associated
with a set of region files stay in single folder.
New script parses regions and profile fitting output for fit domain and
FWHM locations and generates two sets of output regions -- one on rim,
one downstream of rim.
Small updates to multiple scripts, including profile fitting outputs
Make output from XSPEC fits, made multipanel plots

spec_plot.py updated to output data and fit parameters for further
processing.  Plotting notebook reads FWHM fits and spectrum fits
to generate multipanel plots of profiles and spectra for
circulation / paper.